An isoseismal map is a type of map used in seismology to illustrate the intensity of seismic shaking experienced during an earthquake across different geographical locations. It features lines, called isoseismals, that connect points of equal intensity or shaking level. These contours help visualize how the intensity of shaking diminishes with distance from the earthquake epicenter. The map is typically based on data gathered from eyewitness accounts, seismic instrumentation, and the effects of the earthquake on structures and the landscape.
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